Canon RF 28mm f/2.8 STM vs Canon RF 50mm f/1.8 STM Lens
The bottom line
These cover different focal lengths — the Canon RF 28mm f/2.8 STM is 28mm, the Canon RF 50mm f/1.8 STM Lens is 50mm — so they're not really substitutes. Pick by the field of view you actually need: the Canon RF 28mm f/2.8 STM for standard, the Canon RF 50mm f/1.8 STM Lens for short-telephoto / portrait.
Choose the Canon RF 28mm f/2.8 STM if…
- ✓You shoot wide — it starts at 28mm vs 50mm for landscapes, interiors and architecture.
- ✓You value portability — at 120g (4.2 oz) it's lighter than the 160g (5.6 oz) alternative for travel and all-day carry.
Choose the Canon RF 50mm f/1.8 STM Lens if…
- ✓You want more light and background blur — f/1.8 is faster than f/2.8, better for low light and subject separation.
- ✓You need more reach — it goes to 50mm vs 28mm for distant subjects, wildlife and sport.
Where they differ
- ›Aperture: the Canon RF 50mm f/1.8 STM Lens opens to f/1.8 vs the Canon RF 28mm f/2.8 STM's f/2.8 — more light and shallower depth-of-field.
- ›Focal range: Canon RF 28mm f/2.8 STM is 28mm, Canon RF 50mm f/1.8 STM Lens is 50mm — different framing and reach.
Frequently asked
Is the Canon RF 28mm f/2.8 STM or the Canon RF 50mm f/1.8 STM Lens better?
These cover different focal lengths — the Canon RF 28mm f/2.8 STM is 28mm, the Canon RF 50mm f/1.8 STM Lens is 50mm — so they're not really substitutes. Pick by the field of view you actually need: the Canon RF 28mm f/2.8 STM for standard, the Canon RF 50mm f/1.8 STM Lens for short-telephoto / portrait.
Who should choose the Canon RF 28mm f/2.8 STM?
Choose the Canon RF 28mm f/2.8 STM if you shoot wide — it starts at 28mm vs 50mm for landscapes, interiors and architecture. Choose it if you value portability — at 120g (4.2 oz) it's lighter than the 160g (5.6 oz) alternative for travel and all-day carry.
Who should choose the Canon RF 50mm f/1.8 STM Lens?
Choose the Canon RF 50mm f/1.8 STM Lens if you want more light and background blur — f/1.8 is faster than f/2.8, better for low light and subject separation. Choose it if you need more reach — it goes to 50mm vs 28mm for distant subjects, wildlife and sport.
What is the main difference between the Canon RF 28mm f/2.8 STM and the Canon RF 50mm f/1.8 STM Lens?
Aperture: the Canon RF 50mm f/1.8 STM Lens opens to f/1.8 vs the Canon RF 28mm f/2.8 STM's f/2.8 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 28mm | 50mm |
| Lens Type | Prime | Prime |
| Optical Elements | 9 | 6 |
| Optical Groups | 7 | 5 |
| Aperture & Iris | ||
| Maximum Aperture | f/2.8 | f/1.8 |
| Minimum Aperture | f/22 | f/22 |
| Aperture Blades | 7 | 7 |
| Rounded Aperture | No | Yes |
| Coverage & Angle | ||
| Format Coverage | Full-Frame | Full-Frame |
| Lens Mount | Canon RF | Canon RF |
| Angle of View | 75° | 46° – 46° |
| 35mm Equivalent | − | − |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | STM | STM |
| Focus Limiter | No | No |
| AF/MF Switch | No | No |
| Min Focus Distance | 19 cm | 30 cm |
| Max Magnification | 0.26x | 0.25x |
| Stabilization & Video | ||
| Optical Stabilization | No | No |
| Aperture Ring | No | No |
| Declickable Aperture | No | No |
| Parfocal | No | No |
| Internal Zoom | No | No |
| General | ||
| Price (MSRP) | $299 | $239 |
| Filter Size | 43mm | 43mm |
| Diameter | 69.2mm | 69mm |
| Length | 24.7mm | 40mm |
| Weight | 120g (4.2 oz) | 160g (5.6 oz) |
| Weather Sealed | No | No |
| Tripod Collar | No | No |
